Can anyone tell me which would be better for my Radiator:
4 fans in puch/pull
OR
2 fans with shrouds

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Hmm.. Id probably have to say push pull if you have the room, just because even though with a shroud you don't have the dead spot, the air doesn't actually go through the rad like with a pull fan. Im not expert though, so let's see what other's say.

Can anyone tell me which would be better for my Radiator:
4 fans in puch/pull
OR
2 fans with shrouds

Click to expand...

Well as we discussed earlier, a shroud eliminates dead spots, but can also mess with air pressure, the configurating would matter on fin density, some rads out there swiftech being one of them benifit far more from push pull than a shroud because of fin density.

I gave up on my x58a-ud5 after a series of crashes. It has now been retired as a folder and will be crunching a low speed instead. I can't boot at anything higher then 185x21 (and 185x12) and that made it crash 85 % in a -bigadv. It might go back in action when I cool of but for the next 10 days it is sent to the corner. Team is down 33 minus 9 K (gpu is back on) for now.

Im having problems with my board now too. I was trying to go for a 4.2 clock and finally gave up. Went back and loaded my 4.0ghz BIOS and now their is no 21x multi? I've searched everything in the BIOS and can't find it.

I gave up on my x58a-ud5 after a series of crashes. It has now been retired as a folder and will be crunching a low speed instead. I can't boot at anything higher then 185x21 (and 185x12) and that made it crash 85 % in a -bigadv. It might go back in action when I cool of but for the next 10 days it is sent to the corner. Team is down 33 minus 9 K (gpu is back on) for now.

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What CPU/stepping do you have running in that rig.I have a 920 D0 running in my UD3R at 200x21.
When it finishes it's next -bigadv I can do a reboot and check the bios settings for you, if you like.It might give you somewhere to start with your settings.